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The Nature of the Stable Soft X-ray Emissions in Several Types of Active Galactic Nuclei Observed by Suzaku
Hirofumi Noda, Kazuo Makishima, Kazuhiro Nakazawa +3
To constrain the origin of the soft X-ray excess phenomenon seen in many active galactic nuclei, the intensity-correlated spectral analysis, developed by Noda et al. (2011b) for Ma…
Suzaku Studies of Wide-Band Spectral Variability of the Bright Type I Seyfert Galaxy Markarian 509
Hirofumi Noda, Kazuo Makishima, Shin'ya Yamada +3
The Type I Seyfert galaxy Markarian 509 was observed with Suzaku in 2010 November, for a gross time span of 2.2 days. Timing and spectral properties of the 0.5-45 keV X-rays, detec…
Suzaku Discovery of a Hard Component Varying Independently of the Power-Law Emission in MCG-6-30-15
Hirofumi Noda, Kazuo Makishima, Yuuichi Uehara +2
Focusing on hard X-ray variability, we reanalyzed Suzaku data of Type I Seyfert galaxy MCG-6-30-15 obtained in 2006. Intensity-sorted spectroscopy and a principal component analysi…